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3D plot of three axes of the NMMDS analysis of a GDA dissimilarity matrix of the geometry of the prepubic process of the pubis
for 36 iguanodontoidean specimens. Each dot is surrounded by the outline of the preacetabular process of the specimen that it represents. Colors
indicate the following groups: green = non-hadrosaurid Iguanodontoidea; blue = non-lambeosaurine Hadrosauridae; red = Lambeosaurinae;
yellow = Hadrosauridae indeterminate. The inserted smaller plot shows the Bayesian Information Criterion (BIC) for various numbers of clusters
in which the data may be classified. Abbreviations in the BIC plot are as in Fig. F.4.